So I recently aquired a 1975 Yamaha Chappy, and I'm not too fermiliar with mopeds. I have a general understanding how a two-stroke engine works, but I'm not really knowledgeable about bikes at all. Does anyone know a good book or website that would help me with either my chappy, or just small bikes/mopeds in general ( I think it's not technically a moped, cause it's 80cc, but I assume people around here might still have good advice). thanks in advance.